$ lsnrctl start

The listener supports no services
The command completed successfully
这样启动后远程连接会报错：
oracle ORA-12514:TNS:listener does not currently know of service requested in connect descriptor

问题原因：数据库实例没注册到listener解决方法一：
在listener.ora里面添加了一行

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(SID_NAME = orcl)
)
)

注：里面的orcl根据你安装的数据库实例名确定，我用此法解决了这个报错。

解决方法二：
登录数据库：
$sqlplus / as sysdba
显示服务名：
SQL>show parameter service_names
强制注册服务：
SQL>alter system register;
查看监听状态：
$lsnrctl status

--转自

Error Id: ORA-12514

Title: TNS:listener does not currently know of service requested in connect descriptor

Description:

TNS:listener does not currently know of service requested in connect descriptor

Action:

- Wait a moment and try to connect a second time. - Check which services are currently known by the listener by executing: lsnrctl services <listener name> - Check that the SERVICE_NAME parameter in the connect descriptor of the net service name used specifies a service known by the listener. - If an easy connect naming connect identifier was used, check that the service name specified is a service known by the listener. - Check for an event in the listener.log file.

Cause:

The listener received a request to establish a connection to a database or other service. The connect descriptor received by the listener specified a service name for a service (usually a database service) that either has not yet dynamically registered with the listener or has not been statically configured for the listener. This may be a temporary condition such as after the listener has started, but before the database instance has registered with the listener.

-- 来自：